from django.contrib.auth.backends import ModelBackend
import re

from .models import User

def jwt_response_payload_handler(token, user=None, request=None):
    '''自定义jwt认证 成功返回数据'''

    return {
        'token': token,
        'user_id': user.id,
        'username': user.username
    }

def get_user_by_account(account):
    '''根据账号获取user对象'''

    try:
        if re.match(r'^1[3-9]\d{9}$', account):
            user = User.objects.get(mobile=account)
        else:
            user = User.objects.get(username=account)
    except User.DoesNotExist:
        return None

    else:
        return user

class UsernameMobileAuthBackend(ModelBackend):
    '''自定义用户名和手机号认证'''
    def authenticate(self, request, username=None, password=None, **kwargs):
        # 检验用户名,密码
        # 根据账号查询数据库,获取用户对象
        user = get_user_by_account(username)

        # 校验密码
        if user is not None and user.check_password(password):
            return user

